物理超声改性膨润土吸附结晶紫染料的性能研究  

Adsorption of crystal violet dye by physical ultrasonic modified bentonite

作　　者：陈勇 程宁 杨育兵 卢凯玲 罗应 Chen Yong;Cheng Ning;Yang Yubing;Lu Kailing;Luo Ying(Department of Food and Chemical Engineering,Liuzhou Institute of Technology,Liuzhou 545616,China;College of Environment and Food Engineering,Liuzhou Vocational and Technical College,Liuzhou 545000,China)

机构地区：[1]柳州工学院食品与化学工程学院,广西柳州545616 [2]柳州职业技术学院环境与食品工程学院,广西柳州545000

出　　处：《工业水处理》2021年第9期98-103,共6页Industrial Water Treatment

基　　金：广西高校中青年教师科研基础能力提升项目(2020KY60019,2019KY1108);广西科技大学鹿山学院科研创新团队项目(2018LSTD02)。

摘　　要：为避免化学改性膨润土消耗大量化学试剂和二次污染,利用超声波对钙基膨润土进行改性得到超声钙基膨润土吸附材料,并将其用于吸附处理结晶紫模拟的染料废水。考察了超声制备工艺条件对吸附材料吸附性能的影响,并对其吸附机制及吸附热力学进行了研究。结果表明,在超声功率为100 W,超声时间为7 h的条件下制备得到的改性膨润土吸附效果最佳,对250 mg/L的结晶紫去除率达99.64%,吸附量达249.09 mg/g;准二级动力学方程和Langmuir等温吸附方程更适合描述该吸附机制,即对结晶紫的吸附主要是由化学吸附控制的单分子层吸附为主;热力学分析表明该吸附为自发吸热过程,高温对吸附更有利。To avoid the consumption of massive chemical reagents and secondary pollution when preparing chemica-lly modified bentonite,bentonite was modified by ultrasonic wave to obtain ultrasonic calcium bentonite adsorption material,which was used to treat the simulated dye wastewater of crystal violet.The effects of ultrasonic preparation conditions on the adsorption properties of the adsorbents were investigated,and the adsorption mechanism and ther-modynamics were studied.The results showed that the modified bentonite with ultrasonic power 100 W and ultrasonic time 7 h had better adsorption effect,and the removal rate and adsorption capacity reached 99.64%and 249.09 mg/g respectively when the concentration of crystal violet was 250 mg/L;the pseudo-second order kinetic equation and la-ngmuir isotherm adsorption equation were more suitable to describe the adsorption behavior mechanism and the crys-tal violet molecule is adsorbed on a single layer by chemical action;thermodynamic analysis showed that the adsorp-tion was spontaneous endothermic process,high temperature was more beneficial to adsorption.

关 键 词：超声 膨润土 结晶紫 吸附 

分 类 号：X703.1[环境科学与工程—环境工程]